Dial-a-cat is a project that allows users to send and receive pictures of cats using the Martin M2 SSTV transmission method over the telephone. The project uses Twilio for its Interactive Voice Response (IVR) functionality, Python, Flask, pySSTV, and the Cat API. It generates pre-rendered SSTV transmissions from images stored on a server, as well as streaming live SSTV transmissions of random internet images. Users can press buttons such as "0" to get help or "8" to receive a new image. The project is built using Twilio's TwiML tag and uses the pySSTV library to handle the SSTV transmission. It was created by Joel Franusic, who was inspired by an art installation that used SSTV transmissions and wanted to create something similar but with a more user-friendly interface.